A woman filmed unleashing a vile torrent of racist abuse at passengers on a New Addington bound tram has finally admitted her guilt.

Emma West, of New Addington, was secretly filmed by a fellow passenger on a mobile phone and the clip, entitled My Tram Experience, was posted on the video sharing site YouTube in November 2011.

The two minutes and 25 seconds video went viral, shocking people around the world.

More than 2.2m people viewed the clip in the first 24 hours of it being posted online and 88,000 members of the public commented on the footage.

West, on a Wimbledon to Croydon tram with a toddler on her knee, shouted: “What has this country come to? A load of black people and a load of f***ing Polish.

“You ain’t English. No, you ain’t English either. You ain’t English. None of you’s f***ing English.

“It’s nothing now. Britain is nothing now. My Britain is f*** all now.”

Others posted links to the video on their social networking accounts, and the film inspired a number of other people to record other racist behaviour on public transport.

Within days of the video going viral, West was charged with a racially aggravated section 4 public order offence.

But on Monday, more than a year-and-a-half later, after a string of adjournments in the case where her lawyers claimed her mental health problems meant she was not fit to stand trial, West finally admitted the racist rant.

Appearing at Croydon Crown Court, West pleaded guilty to the lesser charge of a racially aggravated section 5 public order offence – using threatening, abusive or insulting words or behaviour, or disorderly behaviour that is likely to cause harassment, alarm or distress. She does not face jail for the offence.

Today, the Croydon Guardian can also reveal how last month West pleaded guilty to stabbing and slashing her partner Ricky Metson, with an ornamental knife and assaulting a police officer.

The mum-of-two had enjoyed a family day out and was dancing in the living room with her partner of 12 years, when all of a sudden she snapped during a conversation about her brother and started punching and slapping Mr Metson, Croydon Magistrates’ Court was told.

Remi Ogunfowora, prosecuting, said: “Mr Metson put his hands up in front of him to protect himself and told her to calm down. She said she was going to call her mum and ran upstairs and Mr Metson followed.

“As he entered the room she picked up an ornamental knife from its sheath, struck him in the head and started slashing at his body. He slapped her around the face in self defence to try and calm her down and went downstairs.

“She followed him down the stairs and stabbed him in the back at least twice. She tried to run out the house and he stopped her leaving and called the police.”

Croydon Magistrates’ Court heard when police arrived they found Mr Metson, who was only wearing a pair of shorts covered in blood. Officers recovered a knife from the property that was about six to eight inches long.

Ms Ogunfowora said: “Mr Metson suffered two puncture wounds on his back and various slash and scratch wounds over his stomach, head, back of his neck, arms and legs. When officers tried to arrest Miss West she started to kick them.”

Mr Metson is standing by West after her attack on him, and was with her at court on Monday.

The tram rant case and the assault cases were adjourned until June 24 pending pre-sentence reports. Recorder of Croydon Judge Warwick Mckinnon indicated he would pass a community sentence for the three offences.